Chapter 14. OPEN NETWORK
OPERATIONS
14.1 Overview
This chapter summarizes the functionality and specifications of the various Open Network
operating modes:
•
IBS
•
Drop and Insert (D&I)
•
IDR
14.2 IBS
Primary Data Rates Supported
G.703
1544, 2048, 6312 and 8448 kbps SD, RD
EIA-422, V.35, LVDS
N x 64 kbps SD, RD (up to 8448 kbps)
ADPCM Audio
(2 Channels)
64 kbps only, full duplex
Engineering Service Channel
Earth Station-to-Earth
Station Channel
EIA-232 data synchronous at 1/480 of the primary data
EIA-232 data asynchronous at 1/2000 of the primary data
High Rate Engineering Service Channel
ESC Data Interface Type
Async – configurable async character format, EIA-232 at up to
1/20
th
of primary data rate
ESC Data Rate
Example: 2400 baud at 64 kbps
Faults and Alarms
Satellite Backward Alarm
1 (per IESS-309)
Receive BWA Output
Enabled onto terrestrial secondary alarm
14–1
